[That_Look_Photo]

Eldor,
You still have high voltage and it is ac voltage. The Hensel Porty is just converting dc voltage to a signwave output . The signwave output is just like your ac in your house. And keep in mind the flash tube is flashed with very high voltage. I did a shoot with a model in a hottub and the floor was just damp from other people that were in it just before us. I was thinking of the safety of the model and not myself by not having a radio transmitter to fire the flash . I used a sinq cord and when I went to press the shutter I was shocked from my feet to my shutter finger. I sent the camera flying across the room. And yes I had a good ground. I had bare feet and that was not a good idea. Keep your rubber sole sneekers on when shooting.
Water and high voltage just does not work together very well. There are just to many things that can fail and hurt someone bad..
If you must use a flash try to insulate the tripod from the floor with some kind of rubber mat.

Mike